N15K-2T1-B 110dB IP55 Waterproof Wireless Doorbell, Receiver x 1 and Transmitter x 2, US Plug(Black)

1. Strong penetration ability, meeting household needs 2. Waterproof design, no fear of rain invasion, safe and durable 3. Flat panel, no dust, easy to clean. 4. Touch transmitter, service life of more than 100,000 times. 5. ABS flame retardant shell, precision parts, patch technology. 6. Signal penetration can reach 300 meters. 7. Adjustable music, simple and convenient installation and use. 8. Ultra-low energy consumption, wireless installation, convenient and fast. 9. Parameters: Operating frequency: 433.92MHz+/-280KHz Receiver voltage: 110-260V/50-60Hz Transmitter battery: 12V 23A alkaline zinc-manganese battery Operating temperature: -30~70 degrees Celsius